What does data encryption storage include?

Data encryption storage includes symmetric encryption, asymmetric encryption, hash algorithm, digital signature and other methods. Detailed introduction: 1. Symmetric encryption. During the encryption process, the original data and key are calculated by the encryption algorithm to generate encrypted ciphertext; 2. Asymmetric encryption. During the asymmetric encryption process, the data encrypted with the public key only Can be decrypted with the private key and vice versa; 3. Hash algorithm, which can verify the integrity and consistency of the data during data transmission and storage; 4. Digital signature, etc.

Data encryption storage is an important technology to protect information security. It can process the original data so that it cannot be accessed by unauthorized visitors. Get and decode. In today's information society, data has become one of the most important assets of an enterprise, so data encryption storage technology has been widely used in various fields. This article will introduce in detail the principles and methods of data encryption storage and their specific implementation in practical applications.

1. Principle of data encryption storage

The basic principle of data encryption storage is to prevent unauthorized visitors from obtaining the data by converting original data into specially processed ciphertext. Sensitive information. This process requires the use of encryption algorithms and keys. The encryption algorithm is a series of mathematical operations that takes the original data (plaintext) and the key as input, and after certain calculations, an encrypted ciphertext is generated. Only legitimate users who have the key can restore the ciphertext to the original data (plaintext) through the same encryption algorithm.

2. Method of data encryption and storage

Symmetric encryption

Symmetric encryption is a common encryption method that uses the same key to the original Data is encrypted and decrypted. During the encryption process, the original data and key are calculated by the encryption algorithm to generate encrypted ciphertext; during the decryption process, the ciphertext and key are calculated by the same encryption algorithm and restored to the original data. There are many symmetric encryption algorithms, such as DES, AES, etc.

Asymmetric encryption

Asymmetric encryption is different from symmetric encryption. It uses two different keys, the public key and the private key, to encrypt and decrypt respectively. In asymmetric encryption, data encrypted with the public key can only be decrypted with the private key, and vice versa. There are many kinds of asymmetric encryption algorithms, such as RSA, DSA, etc.

Hash algorithm

The hash algorithm is to generate a fixed-length hash value by performing certain calculations on the original data. The hash value can be regarded as the "fingerprint" of the original data, which is unique and irreversible. Through the hash algorithm, the integrity and consistency of the data can be verified during the data transmission and storage process. Common hashing algorithms are MD5, SHA-1, etc.

Digital signature

Digital signature is a technology that ensures data integrity and identity authentication. It uses an asymmetric encryption algorithm to encrypt data and generate digital signatures. After the recipient receives the data, it can verify the authenticity of the digital signature through the same asymmetric encryption algorithm and the sender's public key, thereby ensuring the integrity of the data and the identity of the sender.

3. Implementation of data encryption storage in practical applications

Database encryption storage

In the database, you can encrypt and store data by setting table fields Encrypted data storage is achieved through process encryption and other methods. For example, in SQL Server In the database, the values ​​of certain table fields can be set for encrypted storage to protect sensitive data; in the Oracle database, you can use DBMS_CRYPTO package to implement data encryption storage and query.

File encrypted storage

File encrypted storage refers to encrypting files and storing them on the computer's disk or other storage devices. Common file encryption tools include TrueCrypt, 7-Zip wait. Users can set up encrypted folders or encrypted files to protect the privacy of data.

Cloud Storage Encryption

With the development of cloud computing technology, more and more companies are beginning to store data in the cloud. Cloud storage encryption refers to encrypting and protecting data stored on the cloud storage platform. Common cloud storage service providers such as Dropbox, AWS, Microsoft and Google, etc., all provide the function of encrypted data storage. Users can set up encrypted storage on the cloud storage platform to protect data security.

In short, data encryption storage is a technical means to effectively protect information security. By encrypting the original data, the data can be prevented from being illegally accessed and stolen during transmission and storage. In practical applications, data encryption storage can be achieved through various methods such as symmetric encryption, asymmetric encryption, hash algorithms, and digital signatures. At the same time, with the development of cloud computing technology, cloud storage encryption has gradually become an important direction for data encryption storage.

The above is the detailed content of What does data encryption storage include?. For more information, please follow other related articles on the PHP Chinese website!